Performance of SPI point-source data analysis

被引：0

作者：

Dubath, P ^{[1
]}

Kreykenbohm, I ^{[1
]}

Knödlseder, J ^{[1
]}

Connell, P ^{[1
]}

Skinner, GK ^{[1
]}

Strong, A ^{[1
]}

Sizun, P ^{[1
]}

Attié, D ^{[1
]}

Schanne, S ^{[1
]}

Cordier, B ^{[1
]}

Bouchet, L ^{[1
]}

von Kienlin, A ^{[1
]}

机构：

[1] INTEGRAL Sci Data Ctr, CH-1290 Versoix, Switzerland

来源：

PROCEEDINGS OF THE 5TH INTEGRAL WORKSHOP ON THE INTEGRAL UNIVERSE | 2004年 / 552卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Performances of SPI data analyses of point sources are assessed using the Crab observations gathered during the first year of INTEGRAL operations. At low and intermediate signal-to-noise (SIN) ratios, the errors for both positions and fluxes provided by the imaging reconstruction program spiros are perfectly consistent with the distributions of the results of independent analyses. For higher S/N, spiros underestimates the real uncertainties, certainly because it does not take into account systematic errors, which can become comparable, or even larger, than statistical ones. Realistic source confusion tests are carried out by adding simulated data to the Crab observation. These tests demonstrate that spurious results can be obtained when the source separation is equal or smaller than 2 degrees. However, reliable flux values can be obtained for closer sources if their positions are fixed in the data deconvolution process.

引用

页码：841 / 845

页数：5